Well, it's original damage is 0, but is increased by 5 for each alteration made on his skill set, like if you use naraka path all his skills are increase by 1 random chakra, so 4 skills were alterated, so Naraka Path will deal 20 damage, if you use Human Path too, it will increase the cooldown of his skills do more 20 damage. get it? and after used all his skills resets to their original forms like if nothing happened.